Question

if the CP of 10 tubelight is equal to the SP of 8 tubelight find the gain or loss percent

Answer 1

let total C.P=80 RS,

C.P of 10 tube light=80rs.

then
C P of 1 tube light=8 rs.

S.P of 8 tube light =80 rs.

then
S.P of 1 tube light =10 rs.

then
profit=10-8=2 rs.

then
%profit=2/8×100=25%